Mercedes-Benz 300E Speaker Size

Dashboard Speaker

Rear Deck Lid Speaker

Mercedes-Benz 300E Speaker FAQ

What speakers should I replace first in my Mercedes-Benz 300E?

Replace the 5.25-inch rear deck speakers first. These handle most of your mid-range frequencies and bass output - around 80Hz to 4kHz typically. The dashboard 4-inch speakers mostly cover highs and upper mids, so they're less critical for overall sound improvement. Your 300E's rear deck location also provides better acoustic coupling with the cabin space. Start there, then upgrade the dash speakers if you want more presence in the upper frequencies.

Can I install component speakers in the Mercedes-Benz 300E rear deck?

Yes, the rear deck lid accepts component speakers in the 5.25-inch size. You'll need to mount the tweeter separately though - maybe in the rear parcel shelf area or kick panels. Component systems typically offer better imaging since you can position the tweeter for optimal dispersion. The crossover can mount under a seat or in the trunk. Just verify your amplifier can handle the impedance load - most component sets run 4 ohms but some are 8 ohms.

What's the power handling for Mercedes-Benz 300E factory speakers?

Factory speakers in the 300E probably handle around 15-25 watts RMS. The 5.25-inch rear speakers might take slightly more power than the 4-inch dash units. If you're running an aftermarket amplifier, look for replacement speakers that can handle 50-75 watts RMS - gives you headroom without overpowering. The factory head unit puts out maybe 10-15 watts per channel, so you don't need massive power handling if staying with stock electronics.

Why does my Mercedes-Benz 300E sound muddy in the bass frequencies?

The 5.25-inch rear speakers are trying to reproduce too much low-end content. These drivers typically start rolling off around 80-100Hz, but your music has content down to 40Hz or lower. The rear deck mounting doesn't help either - it's not sealed properly in most cases. Consider adding a small subwoofer or replace the rear speakers with ones that have better low-frequency response. Sometimes the factory speakers just deteriorate over time... foam surrounds fail after 30+ years.

Should I upgrade to coaxial or stick with full-range speakers in my Mercedes-Benz 300E?

Coaxial speakers usually offer better high-frequency response than basic full-range drivers. The tweeter in a coaxial design handles frequencies above 3-4kHz more efficiently. Your 300E's dashboard location might benefit from coaxials since they can project highs better toward the listening position. For the rear deck, either type works... though coaxials give you more flexibility if the original full-range speakers sound too dark or muffled in the upper ranges.